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Rhythmic interactions between the mediodorsal thalamus and prefrontal cortex precede human visual perception.

ABSTRACT: The thalamus is much more than a simple sensory relay. High-order thalamic nuclei, such as the mediodorsal thalamus, exert a profound influence over animal cognition. However, given the difficulty of directly recording from the thalamus in humans, next-to-nothing is known about thalamic and thalamocortical contributions to human cognition. To address this, we analysed simultaneously-recorded thalamic iEEG and whole-head MEG in six patients (plus MEG recordings from twelve healthy controls) as they completed a visual detection task. We observed that the phase of both ongoing mediodorsal thalamic and prefrontal low-frequency activity was predictive of perceptual performance. Critically however, mediodorsal thalamic activity mediated prefrontal contributions to perceptual performance. These results suggest that it is thalamocortical interactions, rather than cortical activity alone, that is predictive of upcoming perceptual performance and, more generally, highlights the importance of accounting for the thalamus when theorising about cortical contributions to human cognition.

SUBMITTER: Griffiths BJ

PROVIDER: S-EPMC9243108 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature

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Rhythmic interactions between the mediodorsal thalamus and prefrontal cortex precede human visual perception.

Griffiths Benjamin J BJ Zaehle Tino T Repplinger Stefan S Schmitt Friedhelm C FC Voges Jürgen J Hanslmayr Simon S Staudigl Tobias T

Nature communications 20220629 1

The thalamus is much more than a simple sensory relay. High-order thalamic nuclei, such as the mediodorsal thalamus, exert a profound influence over animal cognition. However, given the difficulty of directly recording from the thalamus in humans, next-to-nothing is known about thalamic and thalamocortical contributions to human cognition. To address this, we analysed simultaneously-recorded thalamic iEEG and whole-head MEG in six patients (plus MEG recordings from twelve healthy controls) as th ...[more]

PMID: 35768419

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Rhythmic interactions between the mediodorsal thalamus and prefrontal cortex precede human visual perception.

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Rhythmic interactions between the mediodorsal thalamus and prefrontal cortex precede human visual perception.

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